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Smudge pots were at one time widely used to ward off damage from light frosts in Southern California citrus orchards.
Ojai Valley, east of Ojai, CA (1974).
Rotary snow plow locomotives have long been used to keep deep snow in the Sierra from blocking the rail lines.
California State Railroad Museum, Sacramento, CA (1987).
Blue gum eucalyptus are periodically killed back by unusual freezes in coastal California, but they usually resprout from under the bark and recover fully.
Sonoma High School, south of Sonoma, CA (1991).
Extreme heat makes it necessary to close this park at a time of year when most campgrounds are at their busiest.
Vallecito CP, on county road S2 adjacent to Anza Borrego Desert SP, CA (1993).
Tradition says the stone base of this monument to the ill-fated Donner Party marks the depth of the snow in the winter of 1847-48.
Donner Memorial SP, near Truckee, CA (1985).
After severe frost killed back extensive eucalyptus groves in the Berkeley Hills, many acres were clearcut to reduce potential fire danger.
Grizzly Peak Boulevard, Berkeley Hills, CA (1974).
Unusually prolonged freezing temperatures killed almost all eucalyptus trees in the Berkeley Hills back to their trunks and major branches.
Siesta Valley, near Orinda, CA (1973) Photograph by Daniel O. Holmes..
A roofed campsite can be a welcome sight indeed to campers in the rainy climate of western Washington.
Bogachiel SP, WA (1984).
Wind and glare in the gypsum dunes at White Sands National Monument have made it necessary to equip picnic tables with steel wind and sun shades.
White Sands NM, NM (1980).